Use MinGW Makefiles generator

Author: lauzadis

build-support/src/main/kotlin/aws/sdk/kotlin/gradle/crt/CMakeTasks.kt

@@ -10,6 +10,7 @@ import org.gradle.api.tasks.Delete
 import org.gradle.api.tasks.TaskProvider
 import org.gradle.kotlin.dsl.named
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget
+import org.jetbrains.kotlin.konan.target.Family
 import org.jetbrains.kotlin.konan.target.HostManager
 import org.jetbrains.kotlin.konan.target.KonanTarget
 
@@ -122,6 +123,10 @@ private fun Project.registerCmakeConfigureTask(
                 }
             }
 
+            if (HostManager.hostIsMingw && knTarget.konanTarget.family == Family.MINGW) {
+                args.add("-G \"MinGW Makefiles\"")
+            }
+
             // FIXME? Compiling s2n-tls on GitHub Actions Ubuntu image (without Docker / cross-compilation) has errors like:
             // In function ‘s2n_hash_algorithms_init’
             // error: implicit declaration of function ‘EVP_MD_free’;